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Isolated Shallow Marine Sand Bodies: Deposits for all Interpretations

By
John W. Snedden
John W. Snedden
Mobil Exploration & Producing Technical Center, PO Box 650232, Dallas, TX 75265 U.S.A.
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Katherine M. Bergman
Katherine M. Bergman
Department of Geology, University of Regina, Regina, SK S4S 0A2, Canada
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Published:
January 01, 1999

Abstract

Isolated shallow marine sand bodies detached from coeval coastal deposits and encased in marine mudstone have been a focus of research and exploration in sedimentary geology for over 30 years. Yet, their origin and occurrence continues to spark debate and motivate explorationists interested in accessing the hydrocarbons within these reservoirs. Interpretations of these complex and enigmatic sand bodies have evolved from genetic models based on physical and biological sedimentary structures to regional sequence stratigraphic models invoking allocyclic processes. This evolution of interpretation parallels the stepwise progression of sedimentary geology as a whole. The Shannon Sandstone of Wyoming is a well-documented example of this type of sand body that was originally interpreted as a shelf sand ridge on the basis of sedimentary structures and external geometry. Addition of local and regional stratigraphic studies have generated new ideas involving incised shoreface and estuarine valley-fill models. Determination of the correct model is critical, as the various interpretations imply significant differences in exploration approach and production characteristics.

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Contents

SEPM Special Publication

Isolated Shallow Marine Sand Bodies: Sequence Stratigraphic Analysis and Sedimentologic Interpretation

Katherine M. Bergman
Katherine M. Bergman
Department of Geology University of Regina Regina SK S4S OA2 Canada
Search for other works by this author on:
John W. Snedden
John W. Snedden
Mobil Exploration & Producing Technical Center PO Box 650232 Dallas TX 75265USA
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SEPM Society for Sedimentary Geology
Volume
64
ISBN electronic:
9781565761865
Publication date:
January 01, 1999

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